Telegraph printing and like apparatus



June 21, 1932. R. G. GRIFFITH TELEGRAPH PRINTING AND LIKE APPARATUS 5Sheets-Sheet 1 Filed NOV. -18, 1930 FIG. l-A

INVENTOR RONALD G. GRIFFITH 6 ATTORNEY June 21, 1932. R G G H TELEGRAPHPRINTING AND LIKE APPARATUS Fi led Nov. 18, 1930 5 Sheets-Sheet 2 FIG,l-B

lNVENT'OR RONALD G.GRIFFITH BY 2 t g ATTOR Y June 21, 1932. R. e.GRIFFITH 1,364,302

TELEGRAPH PRINTING AND LIKE APPARATUS Filed Nov. 18, 1950 5 Sheets-Sheet5 II III! iNVENTOR RONALD 6. GRIFFITH ATTORNEY TELEGRAPH PRINTING ANDLIKE APPARATUS Filed Nov. 18. 1930 5 Sheets-Sheet 4 IHIII mvcn'roaRONALD a GRIFFITH BY ORNE? June 21, 1932. R. G. GRIFFITH 1,854,302

TELEGRAPH PRINTING AND LIKE APPARATUS H Filed NOV 18, 1930 5Sheets-SheeQ 5 2 3 4 5 s '7 8 9 IO INVENTOR RONALD G. GRIFFITH BYATTORNEY Patented June 21, 1932 UNITED stares "PATENT OFFICE sow-innGEGRGE GRIFFITH, or oRoYnoN,

ENGLAND, AssIeNoR r INTERNATIONAL COMIVZUNL'CATIONS LABORATORIEES,INCORPGRATED, OF NEW YORK, N. 'Y., A. COR- POB-ATION OF NEW YORKTELEGRAPH PRINTING AND- 'LIKE APPARATUS Application filed November 18,1939, Serial No. 4

This invention relates to telegraph printing and like apparatus operableunder control of a perforated tape.

In telegraph apparatus of this class a distinction can be drawn betweenapparatus.

ing to its manner of adaptation to two diflerent systems of working isknown as the Wheatstone Morse code or the cable Morse code.

The present invention relates more particularly to telegraph codetranslating and printing devices operable under control of a tapeperforated in accordance with an unequal element code'and provides meansfor operating a series of selector magnets in combinations varying inaccordance with each signal combination perforated in the tape, theselector magnets being adapted to control the selection of a charactercorrespondingto the code elements perforated in the tape which characteris printed on apaper slip, sheet or the like. The invention alsoprovides arrangements whereby the selector magnets .L control of theperforated tape. v

According to one feature of the invention, in telegraphic apparatusoperable under'control of a tape perforated in accordance with anunequal elementcode, a selector mechanism comprises in combination aplurality of peckers co-operating with the perforated tape, means tofeed said perforated tape combination by combination, contactsclosed bysaid peckers to actuate corresponding selector magnets in accordancewith each combination perforated in the tape, and means to renderinoperative the remainder of the said selector magnet-s corresponding toelements extraneous to each said combination.

may effect other telegraphic operations under 96,373, and in GreatBritain'scptember 11, 1930.

The invention further to another feature, telegraph apparatus operatingunder control of signals according to an unequalelement code havingmeans for paratus an electrical circuit is prepared by the movement of aprinting'carriage near the end ofeachline and completed upon the 00-currence of the first wor d space thereafter in the perforated tape, andmeans responsive to the closure of said circuit is provided toeffect-carriage return and line feed operations and to arrest the feedof the perforated tape until the completion of said car'- riage return.

These and further features will be evident from the followingdescription taken in conjunction ;with the accompanying drawings inwhich Fig. 1 shows diagrammatically the arrangements for a page printingtelegraph apparatus according shows in greater detailthe arrangements ofspring actuated peckers and feeding means for the controlling perforatedtape, Figs. 3 and 4 show an alternative arrangement'with reference tothe peckers, whilst Figs. 5 and 6 are code charts illustrating theconversion of the unequal element Morse cable code into a uniform 10element code suitable for operating telegraph printing apparatus...

Referring-in the first place to Fig. 2, the selector mechanism hereshown comprises a series of 10 independent peckers 1-5 and 6-10 arrangedin two rows. One row of fiveof provides according to the invention, Fig.2,

these peckers is arranged to co-operate with V dot elements or signalholes perforated on one side of a central row of feed holes in a papertape, and the other row of five peckers which only spring 11 for pecker5 is shown in Fig. 2, to press the peckers against the paper tape. Forbrevity in the following description the peckers together with therespective members in which they are set are referred to collectively aspeckers. Means controlled by a driving shaft is employed to retract allpeckers against the tension of their springs after each selection. Thismeans is shown in Fig. 1 as cam 12 on shaft 13 driven by an externalsource ofpower (not shown), and pivoted lever14-under tension of spring15. An arm 16 of lever 14 extends between and bears against shoulders 17formed on each of all the peckers. When cam 12 raises lever 14 all thepeckersare permitted to rise under tension of their individual springsto press against the perforated tape. Those peckers which encounterblank tape are prevented from rising any further, but those whichencounter perforations in the tape are permitted to rise further.

The controlling paper tape is fedforward combination bycombination bymeans such as toothed star wheel 18 engaging with a central row of feedholes. A spur wheel 19 fixed on the same shaft as star wheel 18 isengage intermittently by a rack 20 actuated at the requisite times by acam 21 on shaft 13 through a lever 22 pivoted at 23and connected to rack20 through a flat spring 24. At the appropriate times another cam 25,also on shaft 13, depresses a lever 26 and through sliding arm 27 androller 28 permits rack 20 to fall and withdraw from engagement with spurwheel 19. On rotation of cam 25 lever 26 subsequently rises and bringsrack 20 into engagement with spur wheel 19.

In order to feed the perforated tape a distance in accordance with thenumber of elements in each combination representing a single character,differential feed comprising stops 28-32- are provided for rack 20.These stops of which there is one for each pair of oppositely arrangedpeckers may each consist of a bell crank lever, as shown in Fig. 2,independently pivoted at 33 and comprising a horizontal arm 34 engagingwith its corresponding pair of peckers through suitable abutments 35formed thereon, and a vertical arm which is movable into and out of thepath of a shoulder 36 formed on the sliding rack 200. The abutments 35on each pecker are arranged so that either of the two peckers in eachpair on rising unobstructed by blank tape raises the horizontal arm ofthe bell crank lever and swings the vertical arm out of the path ofshoulder 36 on rack 20.

The arrangement is such that as shaft 13 revolves cam 21 feeds the tapeforward a distance equal to the number of elements in the combinationlast selected together with one centre hole for the letter space. Thisbrings a fresh combination in the tape over the bank of peckers, thefirst element of the new conibination being set over pecker 1 or 6. Cam12 then permits all the peckers to rise, the ones corresponding tosignal elements perforated in the tape rising the maximum distancewhilst the remainder are obstructed by blank tape. At the first letterspace following the combination set up both of the correspondin pair ofpeckers are maintained number of elements in the combination togetherwith one centre hole for the letter space between each combination.Obviously, the feed movement of the rack 20 does not occur until afterthe withdrawal of the peckers from the tape perforations, the levers 28falling back into their unoperated position when permitted to do so asthe rack moves during the feed movement. The arrangement forms amechanism for successively operating a bank of peckers in combinationsvarying in accordance with each signal combination perforated in acontrolling paper tape, and as thus so far described may be consideredto be already known.

The manner of control of a selector mechanism for effecting printing orlike telegraphic operations and subordinate functions in a page printingapparatus employing pecker means substantially as outlined above willnow be described.

In Fig.1, a series of ten selector magnets 38-42 and 43-47. is shown.These magnets are connected to contacts 48-52 and 53-57 each controlledby a corresponding pecker. the circuits being completed on closure of acontact 58 operated by cam 59 on driving shaft 13. The selector magnetsmay control the selection of a printing character or anysimilaroperation according to any of the methods already well known.When each signal combination in the perforated tape is set up inposition over the bank of peckcrs it will be seen that when the selectedcombination is composed of (in the example described) less than fourelements, peckers other than those forming the elements of the selectedcombination will also be able to close their respective contacts. Inorder to prevent the actuation of those selector magnets correspondingto these extraneous elements, either mechanical or electrical means maybe employed. In Fig. 2 mechanical means is shown and consists ofhorizontal extensions 60-64 on the bell crank levers 28--32. Each ofthese extensions is shaped so as to overlap the corresponding extensionof. the preceding lever.. It will be seen that by this means either ofthe first pair of peckers is free to rise and move its correspondingbell crank lever and extension, and similarly for all the elements ofthe signal combination being selected. At the first letter space,however, the corresponding stop in the series 28*32 is maintained in aposition to arrest rack 20; as described above, and the extension on-thecorresponding stop prevents all succeedin lever extensions in theseriesfrom falling and consequently the corresponding peckers fromrising. The corresponding pecker contacts are thereby, mechanicallymaintained open and only those forming the elements of the one signalcombination are closed.

Alternative means such as the electrical arrangement shown in Figs. 3and 4 may be employed. Each of the bell crank levers,with

the exception of the first, is arranged to close an individual pair ofcontacts 68 which is operated by the rising of either of itscorresponding peckers. Each of these pairs of contacts when closedconnects battery to the next pair of pecker contacts, as shown in Fig.4. The first space in the combinationset up over the peckers willtherefore effect the disconnections of battery from all pecker contactsfollowing in the series and thus pre vent the actuation of thecorresponding selector magnets.

The selection of aprinting character in accordance with the actuation invarying combinations of the series of selector magnets 38-47 may beeffected according to anyof the known methods and as this forms no partof the present invention is not here further described.

In telegraph codes in which the number of elementsis not uniform thefigures are usually assigned the longer signal combinations. In. theMorse code, for example. no letter signal combination contains a greaternumber of elements than four whilst all the figures contain fiveelements. When long series of figures are required to be transmitted itis usual to prefix such a series with an appropriate case shift signaland then to represent each figure by a. signal containing a fewer numberof elements, such signal being normally reserved for a letter. The twosignals to represent such figures are generally referred to as long andshort figures respectively.

In the arrangement shown in Fig. 2 whenever a combination containingfive elements is set up over the bank of peckers a shoulder 69 on rack20 closes contacts 70. This energizes case shift magnet 71 Fig. 1) toraise a printing platen or effect case shift in any convenient manner asalready known and therefore not here described. The printing charactersmay be arranged as shown in the code chart of Figs. 5 and 6 the figuretypes are printed in one case being duplicated, as shown, in the casegroup to which the printer is shifted on reception of long figures. Thisis shown in the column to the right of Fig. 5. By this means lettersgroup in accordance with Morse cable code'signals as shown in Fig. 6 forthe alphabet. On a figure ora five element combination being selectedthe case is shifted and thereafter the so-called short figure signalcombinations 'may be employed to select corresponding figure types also.As shown in Fig. 5 the, usual short figure signal combinations areemployed, the two element combination for letter A, for instance, in theone case being utilized as the short combination for'the figure 1. p

It will be understood that when case shift is effected in response to afive element combination, characters continue to be printed in this caseuntil reshift is effected. This ma be arranged to take place either atthe first wordspace following the case shift, or on reception of aparticular combination perforated in the tape. In this latter casecontacts 72 are closed consequent upon the energization of a particularcombination of selector magnets 38-47 representing a case reshift signalthereby energizing reshift magnet 7 3, each time the selecting magnets38- 47 remain de-energized during a selecting period. Contacts 74: areclosed and operate magnet 75. Each time the selecting magnets 38-47remain de-energized during a selecting period as will occur at each wordspace. Magnet 75 is arranged as shown in Fig. 1, also to effect theenergization of case reshift magnet 7 3. Any convenient manner ofefiecting case shift and reshift upon the operation of these controllingmagnets may be adopted and as this forms no part of the presentinvention is not here further described.

The invention further provides arrangements for effecting certainoperations inci 4 dental to printing on telegraph form blanks,

and particularly the carriage feeding operations such as line feed,column feed and the insertion of fresh message blanks.

In the arrangement shown in Fig. 1 a printing magnet 76 is energizedupon closure of contacts 77 operated by a cam 78 on shaft 13 of theprinting apparatus. After each printing character is selected asdescribed above contacts 77 are closed and energize magnet 76 to effecta printing impulse and subsequent letter space feed. The letter feedefi'ects a movement step by step of a platen carriage 79. When magnet 76is energized and a printing character has not been selected a space feedonly takes place. When the platen car-- riage has been stopped apredetermined num- 3.

ber of spaces and the printing approaches the end of a line, a cam strip80 effects the closure I of contacts 81 through pivoted arm 82 androller 83. On the reception of the first following word space contacts74 are closed known convenient manner.

throughout a period in which printing cam contacts 77 are closed and twocircuits are established. One of these circuits energizes a neutrallyset relay 8% through one winding. The operation of this relay energizesa magnet 85.(see also Fig. 2) which arrests the tape feed and theattendant printing functions by withdrawing rack 20 from engagement withspur wheel 19 and simultaneously breaking the circuit of the=printingmagnet 76 by opening contacts 86. The other circuit is closed throughcarriage return magnet 87 and line feed magnet 88 in'series, whichmagnets then operate and effect the return of the platen carriage andthe rotation of the platen for one line space respectively in anyImmediately the platen carriage 79 is returned-to thecommencement of itstravel it closes contacts 89, as shown in Fig. 1, by the extension ofcam strip '80, for instance. This completes a circuit through contacts77, a second winding of relay 8%, tongue contacts of a second neutrallyset relay 90 and contacts 89 to negative battery. Relay 8% thereuponactuates in a direction to tie-energize magnet which releases and allowsthe tape feed and printing functions which had been arrested tocontinue.

The line feed and carriage return operations may also be effected wheredesired before the end of a line by the insertion of a suitable signalin the perforated tape which effects the closure of contacts 92. Thiscloses a circuit through magnet 88 in parallel with magnet 87 and thewinding of relay S t in series therewith. The carriage return and linefeed operations together with the arrest of the tape feed and printingfunctions is effected and on the completion of the return of the platencarriage 7 9 printing functions are resumed as already described.

Means is also shown in Fig. 1 to stop the printing functions at the endof each message insertion of a fresh message blank. Upon receipt of aparticular signal indicating the end of a message, contacts 91 areclosed and complete a circuit through one winding of relay and the firstmentioned windingof relay 8%- in parallel with magnets 87 and 88. Theneutrally set relay 90 operates to break the starting circuit of relay84 and thus prevents any release of the printing functions, relay 8a isactuated to complete the circuit of magnet 85 and thus arrest theprinting functions and magnets 87 and 88 also operate'to effect thecarriage return and line feed operations, as previously described.

After a fresh message blank has been placed in position a key 92 ismanually operated to complete a circuit through the starting inding ofrelay 90 which causes the actuation of the tongue to the opposite sideand prepares the starting circuit of relay 84. This circuit to providesufficient time to permit the is completed at the correct period duringthe rotation of the printer shift 13 by contacts 7 7 and causes therelease of magnet 85 and the resumption of the printing functions.

In the above description it has not been thought necessary to describein detail certain features of construction which are already well known.For example methods of actuating contacts 72,74, 91 and 92 onenergization of the selector magnets 38- 17 in particular combinationsand the necessary mechanism for effecting the carriage return, linefeed, case shift and reshift, printing and other operations uponactuation of the magnets 87, 88, 71, 73 and 7 6 respectively will bereadily apparent to those acquainted with the art.

That is claimed is:

1. In telegraph apparatus operable under control ofa tape perforated inaccordance with an unequal element code, a selector mechanism comprisingin combination a plurality of peckers for co-operation with theperforated tape, means to feed said perforated tape combination bycombination, a series of sele tor magnet contacts closed by said peckersto actuate corresponding selector magnets in accordance with eachindividual combination of perforations in the tape as fed, and meanstorender inoperative the remainder of said selector magnets correspondingto elements extraneous to each said combination.

2. In a telegraph printer operable under control of a. tape perforatedin accordance with an unequal element code, a series of peckers forco-operation with the perforated tape, intermittently operable tapefeeding means, a series of individual stop members operativelyassociated with the peckers and with said tape feeding means todetermine the feed movement thereof and movable abutment means betweenadjacent stop members 7 maintained by each stop member not operated byits associated pecker or peckers in a position to preventoperation ofthe succeeding stop member of the series together with its associatedpecker or peckers.

3. In a telegraph printer a series of peckers for co-operation with aperforated tape, intermittently operable tape feeding means, a series ofindependent stop members actuated by said peckers and serving todetermine the feed movement of said tape feeding means in accordancewith the number of elements in each combination in the perforated tape,and a corresponding series of overlapping abutments carried by said stopmembers disposed to preventmechanically the actuation of the peckers insaid series after those maintained depressed by the first letter spacein said perforated tape.

4. In a telegraph printer operable under control of a tape perforated inaccordance with an unequal element code, a series of 29:, contactspeckers for cooperation with the perforated tape, a corresponding seriesof selector magnets, contacts controlled by said peckers in the circuitsof corresponding selector magnets, intermittently operable tape feedingmeans, a series of individual stop members 5. In a telegraph printer aseries of peckers for co-operation with a perforated tape, a series ofindependent stop members actuated by said peckers, a series of selectormagnets,

controlled by said peckers and connected in the circuits ofcorresponding selector magnets, and other contacts actuated by said stopmembers for controlling the energization of the circuit of the contactszyof the peckers associated with each succeed:

ng stop member.

6. In a telegraph printer operable under control of a tape perforated inaccordance with an unequal element code, a series of ampeckers forcooperation with the perforated tape means to feed said perforated tapecombination by combination, selecting elements controlled by saidpeckers, means to render inoperative the selecting elements corre-BIfispOnding to the peckers extraneous to each individual combination ofperforations in the tape as fed, and means responsive to the operationof a combination of a predetermined nmnber for effecting case shift. 7

7; In a telegraph printer'for Morse or like unequal element codes, meansresponsive to the reception of a signal in excess of a prethe peckerscorresponding to determined number of elements for effecting case shift,and means responsive to the reception of a particular signal and to wordspaces for effecting case reshift.

8. In a telegraph printer a series of peckers for co-operation with aperforated tape, dif ferentialfeed means for feeding the perforated tapeat each step by an amount varying in accordance with the number ofelements in each combination of perforations :in the tape as fed,contacts closed by said differential feed means when the feed exceeds apredetermined amount, and means operated'on closure of said contacts foreffecting case shift.

9. In a telegraph printer operable under control of a tape perforated inaccordance with an unequal element code, a series of peckers forco-operation with the perforated tape, a. corresponding series ofselecting elements controlled by said peckers, means to of tapeperforations in excessfeed said tape combination by combinationcontrolled by said peckers, means to render inoperative the selectingelements corresponding to the peckers extraneous to each individualcombinationof perforations in the tape as fed, means responsive to theoperation of the peckers corresponding to a combination of tapeperforations in excess of'a predetermined number for effecting caseindividual combination of perforations in the tape as fed, meansresponsive to the operation of the peckers corresponding to acombination of tape perforations in excess of a predetermined number foreffecting case shift, means responsive to the operation of a particularcombination of. the selecting elements for effecting case reshift andmeans associated therewith operable in response to the operatingcondition of the selecting elements resulting from the co-operation ofthe peckers with a portion of the perforated tape signifying a wordspace to effect case reshift. 11. In a page printer operable undercontrol of a perforated tape, contacts closed by the movement of aplaten carriage near the end of its travel to prepare an electricalcircuit, contacts closed in response to a word space in the perforatedtape thereafter to complete said electric circuit, means operated onclosure of said circuit to effect carriage return and line feedoperations, and other means operated on closure of said circuit toarrest the printing functions until the completion of said carriagereturn.

12. In a trol of a tape perforated in accordance with an unequal elementcode, a series of peckers for co-operation' with the perforated tape,acorresponding series of selecting elements controlled by said peckers,means to feed said tape combinations by combination controlled by saidpeckers, means to render inoperative the selecting elements extraneousto each individual combination of perforations in the tape as fed,contact closing means associated with the selecting elements anddisposed to be closed thereby in response to the operating conditionthereof resulting from the co-operation of the peckers with a portion ofthe perforated tape signifying a word space, contacts closed by movementof the platen carriage near the end of its travel to page printeroperable under conan unequal element circuit including said constantclosing means,

carriage return and line feed operations on closure of said circuit bysaid contact closing means, ure of said circuit to arrest the tape helduntil completion of the carriage return.

13. In a page printer operable under control of a tape perforated inaccordance with code, a series of peckers for co-operation with theperforated tape, a corresponding series of selecting elements controlledby said peckers, means to feed said tape combination by combinationcontrolled by said pec :ers, means to render inoperative the selectingelements corresponding to the peckers extraneous to each individualcombination of perforations in the tape as fed, means responsive to theoperation of the peckers corresponding-to a combination of tapeperforations in excess of a predetermined number for efiecting caseshift, con tact closing means associated with the selecting elements anddisposed to be closed thereby in response to the operating conditionthereof resulting from the co-operation of the peckers with a portion ofthe perforated tape representing a word space, means con trolled by saidcontact closing means for effecting case reshift, contacts closed bymovement of the platen carriage near the end of its travel to prepare anelectrical circuit in cluding said contact closing means, means foreffecting carriage return and line feed operations on closure of saidcircuit by said contact closing means, and means operated on closure ofsaid circuit to arrest the printing functions and tape feed untilcompletion of the carriage return.

14. In a page printer operable under control of a tape perforated inaccordance with an unequal element code, a series of peckers, forco-operation with the perforated tape, a corresponding series ofselecting elements controlled by said peckers, means to feed said tapecombination by combination controlled by said peckers, means to renderinoperative the selecting elements corresponding to the peckersextraneous to each individual combination of perforations in the tape asfed,

means responsive to the operation of the peckers corresponding to acombination of tape perforations in excess of a predetermined number foreffecting case shift, contact closing means associated with theselecting elements and disposed to be closed thereby in response to theoperating-condition thereof resulting from the co-operation of thepeckers with a portion of the perforated tape representing a word space,means responsive to the operation of a particular combination of theselecting elements and also to the closure of said contact closing meansfor efiecting case reshift, contacts closed by movement of the platencarriage near the end of its and othermeans operated on clostravel toprepare an electric circuit including said contact closing means, meansfor effecting carriage return and line feed operations on closure ofsaid circuit by said contact closing means, means responsive to theoperation of a particular combination of the selecting elements toeffect carriage return and line feed operations and means operated onactuation of said carriage return means to arrest the printing functionsand tape feed until completion of the carriage return.

15. In a page printer operable under control of a perforated tape,contacts controlled by the movement of a platen carriage to prepare anelectrical circuit, other contacts actuated in response to each wordspace in the controlling tape to complete the said circuit, meansresponsive to the closure of said circuit to effect carriage return andline feed operations, magnet means for arresting and for releasing theprinting functions, a relay controlling said magnet means energized, en-

closure of said ClICLllttO arrest the printing functions, and acontrolling circuit for said relay including contacts closed on returnof the platen carriage and contacts closed periodically by the printingcam for actuating said relay to release the printing functions.

16. In a page printer operable under control of a perforated tape,series of peckers for co-operation with the perforated tape, acorresponding series of selecting elements controlled by said peckers,means for feeding said tape combination by combination, contact closingmeans associated with the selecting elements'and disposed to be closedthereby in response to the operating conditions thereof resulting fromthe co-operation of the peckers with a portion of the perforated tapesignifying a word space, contacts closed by movement of the platencarriage near the end of its travel to prepare an electrical circuit forclosure by said contact closing means,

means responsive to the closure of said circuit to effect carriagereturn and line feed operations, magnet means for arresting and*eleasing the printing functions, a relay controlling the energizationof said magnet means and having one winding energized on closure of saidcircuit to operate said relay to energize said magnet means to arrestthe printing functions and a second Winding in circuit with contactsclosed on return of the platen carriage to operate said relay todeenergize said magnet means to release the tape feed.

17 In a page printer operable under control of a perforated tape, aseries of peckers for co-operation with the perforated tape, acorresponding series of selecting elements controlled by said peckers,means for feeding said tape combination by combination, con tact closingmeans associated with the selecting elements and disposed to be closedthereby in response to the operating condition thereof resulting fromthe co-op eration of the peckers with a portion of the perforated tapesignifying a word space, contacts closed by movement of the platencarriage near the end of its travel to prepare an electrical circuit forclosure by said contact closing means, means responsive to the closureof said circuit to effect carriage return and line feed operations,magnet means for arresting and releasing the printing functions, a relaycon trolling the energization of said magnet means and having onewinding energized on closure of said circuit to operate said relay toenergize said magnet means to arrest the printing functions and a secondwinding in circuit with contacts closed on return of the platen carriageto operate said relay to deenergize said magnet means to release thetape feed, and means responsive to the operablOIl ofa particularcombination of the selecting elements to effect carriage return and linefeed operations and to energize the first mentioned winding of saidrelay.

18. in a page printer operable under control of a perforated tape,series of peckers for co-operation with the perforated tape, a

corresponding series of selecting elements controlled by said peckers,means for feeding said tape combination by combination, contact closingmeans associated with the selecting elements and disposed to be closedthereby in response to the operating condition thereof resulting fromthe co-operation of the peckers with a portion of the perforated tapesignifying a word space, contacts closed by movement of the platencarriage near the end of its travel to prepare an electrical circuit forclosure by said contact closing means, means responsive to the closureof said circuit to efl' ect carriage return and line feed operations,magnet means for arresting and releasing the printing functions, a relaycontrolling the energization of said magnet means and having one windingenergized on closure of said circuit to operate said relay to energizesaid magnet means to arrest the printing functions and a second windingin circuit with contacts closed on return of the platen carriage tooperate said relay to de energize said magnet means to release the tapefeed, circuit closing means responsive to the operation of a particularcombination of the selecting elements to effect carriage return and linefeeding operations and to energize the first mentioned winding of saidrelay, circuit opening means also controlled by said circuit closingmeans to open the circuit of the second mentioned winding of the relayirrespective of said carriage return, and switch means for closing thelast mentioned circuit irrespective of said circuit opening means.

19. In a page printer operable under control of a perforated tape, aseries of peckers for co-operation with the perforated tape,

a corresponding series of selecting element-s controlled by saidpeckers, means for feeding saidtape combination by combination, magnetmeans for arresting andreleasing the tape feed, a relay controlling saidmagnet and having two windings for actuating when energized operates thelatter to efiect' release of the tape feed, said second relay having twowindings for actuating its tongue to close or open the associatedwinding 01. the first relay, contact closing means responsive to theoperation of a particular combination of the selecting elements toenergize the winding ofthe second relay to move its tongue into opencircuit position and to effect carriagereturn and line feed operations,and switch means for energizing the other winding of'said second relay.

20. In a page printer operable under control of a tape perforated inaccordance with an unequal element code, a series of peckers forco-operation with the perforated tape, a corresponding series ofselecting elements controlled by said peckers, means to feed said tapecombination by combination con trolled by said peckers, means to renderinoperative the selecting elements corresponding to the peckersextraneousto each individual combination of perforations in the tape asfed, means responsive to the operation of the peckers corresponding to acombination of tape perforations in excess of a predetermined number foreffecting case shift, contact closing means associated with theselecting elements and disposed to be closed thereby in response to theoperating condi tion thereof resulting from the co-operation of thepeckers with a port-ion of the tape representing a word space, meanscontrolled by said contact closing means for eflecting case reshift,contacts closed by movement of the platen carriage near the end of itstravel to prepare an electric circuit including said contact closingmeans, means for effecting carriage return and line feed operations onclosure of said contact closing means, magnet means for arresting andreleasing the tape feed, a relay controlling said magnet and having onewinding in the circuit aforementioned for actuating the relay tongue tooperate said magnet to arrest the printing functions, and a secondwinding for actuating said relay tongue to operate said magnet torelease the printing functions, a second relay in circuit with saidsecond winding and having two windings for actuating its tongue to openor close said second winding, contact closing means responsive to theoperation of a par tlcular combination of the selecting elements toenergize the winding of the second relay to move its contact tongue intoopen circuit position and to energize the first mentioned Winding of thefirst relay and effect carriage return and line feed operations, andswitch means for energizing the Winding of said sec- 0nd relay to moveits contact tongue into circuit closing position.

In Witness whereof I hereunto subscribe my name this twenty-ninth day ofSeptember, 1930. I

RONALD GEORGE GRIFFITH.

